OK, with the OS2008 update my N800 is playing very nicely with my 3G AT&T phone, which gives me the option of playing videos on the road for my daughter (who's handicapped so one of us always sits in back with her). She's a huge Dora fan, and I found that there are some online Dora streaming videos at:
http://www.nickjr.com/playtime/cats/video/index.jhtml

Problem is that playback is choppy. I know it might be the speed, but I also notice that it's kind of choppy even at home on the WiFi connection which makes me suspect there's an N800 setting or issue.

Suggestions? Help please?

Thanks in advance!